The value of ΔH° for the formation of POCl3 from its constituent elements, P2 (g) + O2 (g) + 3Cl2 (g) → 2POCl3 (g)
Is ________ kJ/mol.
A) -1228.7
B) -397.7
C) -686.5
D) +1228.7
E) +686.5
Correct Answer:
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